Wheel hub cover for rotary air coupling



FIG. 1 is a front, left side perspective view of the wheel hub cover for rotary air coupling, showing our new design;

FIG. 2 is a rear, right side perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is an end view thereof; and,

FIG. 5 is a side view thereof. 

The ornamental design for a wheel hub cover for rotary air coupling, as shown and described. 